首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、They share the same few ancestors. B、They can’t be distinguished from native Californian ants. C、They are evolving faster than
A、They share the same few ancestors. B、They can’t be distinguished from native Californian ants. C、They are evolving faster than
admin
2019-10-03
45
问题
Today, we are going to continue our discussion of social insects, focusing on the Argentineant, which as you might guess is a species of ant that are natives to Argentina. We’ll consider what happened to this type of ant after some members of the species move to California from their original habitat. Ok, well, in Argentina, these Argentine ants behave like most ant species around the world. They fight other ants of the same species if those ants are from some other nests. But the Argentine ants living in California behave differently. Ants from different nests form a single large colony. Within this colony, there is little aggression among ants from different nests. And when they fight insects from outside their colony, the Argentine ants can quickly recruit a huge army from their network of nests. This of course gives them advantages over other ants’ species. So then, why do Argentine ants behave differently in California than they do in Argentina? Well, using genetic testing, researchers found that all the Argentine ants in California were very similar genetically. You see, when the first Argentine ants came to California, their population must have been very small, and all the later generations of Argentine ants there must be descended from the same few ancestors. So they are all closely related. This discovery is important, because for most social insects, membership in a colony is based on how closely related they are genetically.
Now listen to the following recording and answer questions 22 to 25.
22. What aspect of Argentine ant is mainly discussed?
23. What does the professor say about Argentine ants that live in Argentina?
24. What’s the characteristic of Argentine ants in California?
25. What did genetic testing indicate about the Argentine ants in California?
选项
A、They share the same few ancestors.
B、They can’t be distinguished from native Californian ants.
C、They are evolving faster than native Californian ants.
D、Their future survival is in doubt.
答案
A
解析
细节题。根据Well,using genetic testing,researchers found that all the Argentine ants in California were very similar genetically.和all the later generations of Argentine ants there must be descended from the same few ancestors.可知,基因测试表明在加利福尼亚的阿根廷蚂蚁共有一样的少数祖先。因此,正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/5uW7777K
0
大学英语六级
相关试题推荐
Imagineeatingeverythingdeliciousyouwant—withnoneofthefatThatwouldbegreat,wouldn’tit?New"fakefat"products
AstudyconductedbyanAustralianscienceagencyhasdiscoveredsignsthatthecountry’sancientAboriginesmayhavebeenthew
AmericansEugeneFama,LarsPeterHansenandRobertShillerwontheNobelPrizeforeconomicsonMondayfordevelopingmethodst
AmericansEugeneFama,LarsPeterHansenandRobertShillerwontheNobelPrizeforeconomicsonMondayfordevelopingmethodst
Ratherthanusingcustommachinetoolstobuildearlymodelsofnewparts,Fordisnowusing3-Dprintingtechnologytodesigna
ThreeEnglishdictionariespublishedrecentlyalllayclaimtopossessinga"new"feature.TheBBCEnglishDictionarycontainsb
Secondhandsmokeisaccountablefor42,000deathsannuallytononsmokersintheUnitedStates,includingnearly900infants,acc
TheDodgeBrothersA)Itwas100yearsagothisweekthattheDodgebrothersfoundedthepowerfulcarbrandthatstillbearsthe
A、Assignment.B、Entertainment.C、Summervocation.D、Careerplans.A主旨题。两位说话者一直围绕oralpresentation讨论,这属于他们的学业任务。因此,正确答案为A。
A、Climate.B、Instinct.C、Temperature.D、Salinity.B
随机试题
屈原《国殇》:诚既勇兮又以武,__________。
迷路炎晕动病
患者,女,36岁。因心电图示多源频发室早而入院治疗。下列措施不正确的是
关于正常产褥期,以下哪项描述不正确
通常用来控制土的夯实标准的岩土物理力学性能指标是()。
海绵城市,是指城市能够想海绵一样,在适应环境变化和应付自然灾害等方面具有良好的“弹性”,下雨时吸水、蓄水、透水、净水,需要时将蓄存的水“释放”并加以利用。下列属于“城市海绵体”的是:
A、 B、 C、 D、 C分成两部分,
InrecentyearsAmericansocietyhasbecomeincreasinglydependentonitsuniversitiestofindsolutionstoitsmajorproblems.
虚拟存储器的作用是允许(4),它通常使用(5)作为主要组成部分。虚拟存储器的调度方法与(6)基本类似,即把经常要访问的数据驻留在高速存储器中。因为使用了虚拟存储器,指令执行时(7)。在虚拟存储系统中常使用柜联存储器进行管理,它是(8)寻址的。
A、Theman’stelephonenumberis647-0547.B、Theman’stelephonenumberis603-0547.C、Themanwasscheduledtomeetthedoctor
最新回复
(
0
)